EP1316372A2 - Machine de fluotournage avec support d' assistence - Google Patents

Machine de fluotournage avec support d' assistence Download PDF

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Publication number
EP1316372A2
EP1316372A2 EP02018936A EP02018936A EP1316372A2 EP 1316372 A2 EP1316372 A2 EP 1316372A2 EP 02018936 A EP02018936 A EP 02018936A EP 02018936 A EP02018936 A EP 02018936A EP 1316372 A2 EP1316372 A2 EP 1316372A2
Authority
EP
European Patent Office
Prior art keywords
support
auxiliary support
upper support
workpiece
coordinate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02018936A
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German (de)
English (en)
Other versions
EP1316372A3 (fr
Inventor
Mario Anton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hdm-Metalldrueckmaschinen GmbH
Original Assignee
Hdm-Metalldrueckmaschinen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hdm-Metalldrueckmaschinen GmbH filed Critical Hdm-Metalldrueckmaschinen GmbH
Publication of EP1316372A2 publication Critical patent/EP1316372A2/fr
Publication of EP1316372A3 publication Critical patent/EP1316372A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers

Definitions

  • EP 405 720 B1 is a generic spinning machine known, in which the pressure roller in its pressure roller holder is coupled to the upper support via a spring. hereby becomes a local rebound of the spinning roller in those areas of the workpiece on the chuck, in which the wall thickness of the workpiece is above the setpoint lies. This allows the one stored in the control unit Target workpiece contour through an interpolated movement of the Subsupports and the top support arranged at right angles to it be driven off, even if bumps in the Wall thickness distribution of the workpiece is available. Will the Pressing roller deflected against the force of the spring, so builds a counterforce exerted by the pressure exerted by the spinning roller Forming force increases.
  • a disadvantage of the known forming machine is that the spring in view of the high forming forces and the very small occurring spring travel a very high spring constant must have; on the other hand, no damping is provided, so that the system of spinning roller moved by the spring and swing roller holder can swing open. Also the actual current position of the spinning roller is not known because the machine control only for the axes the lower and upper support a position control in a closed Control loop takes place, but the travel of the Spinning roller does not flow into the position control. It is with it also not possible to record the actual contour of the workpiece and any irregularities in the wall thickness distribution counteracted by targeted forming operations. If the wall thickness is locally too small, the spinning roller can the well-known spinning machine that is stored along the Target contour moves, even lift off the workpiece, see above that the smoothing process is interrupted and the workpiece in this area has poor surface quality.
  • Another spinning machine is known from EP 491 240 B1, where the pressure roller against that of a piston-cylinder unit, for example a pneumatic cylinder, exerted force is slidably mounted.
  • the forming force the pressure roller is kept constant; in the event of an increase in pressure part of the fluid is drained from the cylinder.
  • the susceptibility to vibration lower.
  • the true current position of the spinning roller by the machine control is not to be recorded if a retreat the spinning roller against the pneumatic or hydraulic Force has occurred.
  • the forming forces at the moment Press roller position are controlled by the machine control not recorded.
  • the Q axis as that of the movable one Part of the support is also referred to here, both receives its own active drive that controls or is adjustable, as is a displacement transducer with which the Displacement of the spinning roller holder compared to the downstream one X-axis, i.e. the movable part of the upper support, is recordable and that a settlement of the location information of the X and Q axes, the sum of which is then in the position control is included as an X coordinate.
  • the control device the actual coordinate is always given for the X axis the spinning roller, even if it is slightly inside of auxiliary support has been moved.
  • the pressure P (X, Z) can be measured in the piston-cylinder unit during teach-in and be set again in the subsequent automatic sequence, so that at each location of the spinning roller the intended one Forming force is adjustable.
  • the displacement sensor is advantageously an absolute one Displacement sensor, regardless of its position when switched on a measured value for the position of the auxiliary support generated relative to the top support. So after the Switch on the machine and the control unit no reference run more to be done.
  • a remote-controlled support locking device provided, with a releasable connection in at least one locking position of the auxiliary support can be produced with the upper support is.
  • the auxiliary support is preferably compared to the upper support Can be moved by 2 to 5 mm. With this comparatively small Travel distance in relation to the upper support are the invention Advantages already achieved. Due to the low Stroke, a compact design of the auxiliary support is possible, and a brief embodiment of this may be preferred pneumatic cylinder used as drive become.
  • the invention further relates to a method for smoothing a workpiece by means of the spinning machine according to the invention according to claim 5.
  • FIG. 1 shows a spinning machine 100 in a view from shown above. Between a rotatable chuck 2 and a pressure disc 3, a metal blank 1 is clamped. At an angle to the axis of rotation 4 of the main spindle is a Cross support 10 arranged, which initially consists of a sub-support 50 and a top support 50. The Depending on the workpiece contour, cross support can also be parallel to Rotation axis 4 of the main spindle can be arranged.
  • a slide is driven by means of drive mechanisms known per se, in particular by a combination of an electric motor with a ball screw or by a pneumatic or hydraulic cylinder, on which the upper support 40 is mounted, so that it can be moved in a Z direction.
  • the position of the moving part of the sub-support 50 is determined via a displacement sensor 54 (cf. Fig. 2), in particular via an absolute displacement sensor, detected and forwarded to a control unit.
  • a closed control loop is formed by an electronically controlled drive of the Z-axis of the sub-support 50 and the position feedback by the displacement sensor in the form of a measured value Z.
  • the upper support 40 is constructed in a similar manner to the lower support 50; a lower part is fixedly mounted on the slide of the sub-support 50 and forms a movable unit with the latter.
  • An auxiliary support 30 is mounted on the driven slide of the upper support 40; both together can be moved in a direction X relative to the lower support 50 or the lower part of the upper support 40.
  • the position of the slide of the upper support 40 is detected by a further displacement sensor 44 and flows into the control unit as a measured value X H.
  • the auxiliary support 30 carries a pressure roller holder 20 in which a pressure roller 22 is rotatably clamped.
  • the auxiliary support 30 is mounted on the support 40 so that it is relative to this along a direction Q that is parallel to Direction X is displaceable.
  • top and auxiliary support 50, 40 can be operated remotely Support locking device 60 may be provided, with the mechanical coupling of Obersupport 40 and Auxiliary support 30 is to be produced, for example for the Pressing steel blanks without smoothing overflow.
  • the displacement path of the auxiliary support 30 with respect to the upper support 40 in the direction of the coordinate Q is preferably 2 to 5 mm, for example 3 mm, that is in any case a multiple of the expected thickness changes in the workpiece, which are to be compensated for by the Q axis.
  • the displacement path is detected by a displacement sensor 34 and flows into the control unit as measured value X Q.
  • the coordinates X and Q are defined on axes aligned in parallel.
  • the definition is also preferably carried out in such a way that the same direction when moving the upper and auxiliary support 40, 30 also leads to the same sign for the measured values X Q and X H.
  • the slide of the auxiliary support 30 is shown in FIG preferred embodiment by a piston-cylinder unit 32 moved relative to the upper support 40.
  • the Control unit 200 the actual value of the position of the moving Part of sub-support 50 relative to its lower part, the fixed on a machine bed, as a Z coordinate fed.
  • the target value of the location is derived from a Storage and computing device 250 accessed where it was previously stored, for example, by performing a teach-in run has been. Access by the position control device 210 to the storage and computing device 250 can a fast device bus 240 or others known per se Linking devices take place. According to the determined Control difference becomes the drive 52 of the sub-support 50 influenced.
  • Another position control device 220 is provided for the positioning of the moving part of the upper support 40 and influences the drive 42 of the upper support 40.
  • the setpoint value of the X coordinate of the current spinning roller position at the coordinate X is also transmitted via the device bus 240 from the memory and Calculated device 250 and compared with the actual value of the X coordinate.
  • This actual value X is determined in an addition device 222 by adding the position information X Q of the displacement sensor 34 of the auxiliary support 30 and X H of the displacement sensor 44 of the upper support 40.
  • the zero value of the Q coordinate is preferably defined in a starting position of the auxiliary support 30, in which it is located approximately in the middle of the possible total travel path relative to the upper support 40.
  • the value X Q assumes a negative sign if the auxiliary support 30 is pressed back with the pressure roller 22 against the force of the piston-cylinder unit 32, that is to say away from the pressure chuck 2, and is thereby displaced relative to the top support 40.
  • the result of the combination with the value X H namely the X coordinate, which flows into the position control device 220, then decreases by the value of X Q.
  • an X coordinate value can be composed of various combinations of X H and X Q by the over-determination. If, on the other hand, there is a positive sign of the coordinate X Q , this is an indication in operation that the auxiliary support 30 leads the upper support 40 because the spinning roller has not yet had any contact with the workpiece 1 or the spinning chuck 2, which indicates a locally low wall thickness of the workpiece 1 indicates.
  • the control unit performs according to the stored values from the teach-in a position control of the combination of Auxiliary and upper support 30, 40, the drive motor 42 of the upper support 40 by the position control device 220 is influenced. At the same time, the variation the pressurization of the piston-cylinder unit 32 the forming force is adjusted without the path control to adversely affect the pressure roller 20.
  • the support locking device 60 is released, so that the auxiliary support 30 is movable relative to the upper support 40.
  • the auxiliary support 30 is moved into a front starting position, that is to say in the direction of the chuck 2, by pressurizing the piston-cylinder arrangement 32 acting between the auxiliary support 30 and the upper support 40.
  • the value X Q takes on a positive value, for example +1.5 mm.
  • the pressure is controlled via a pressure control device 230 the control unit 200 and a valve unit 36 which preferably with electrical pressure transducers and electrical Actuable pressure valves is provided on a predetermined Held value.
  • the valve unit 36 can in itself known pressure regulating devices such as proportional valves etc. have.
  • An automatic measurement of the position of the Auxiliary supports 30 relative to the upper support 40 by the Displacement sensor 34 The measurement signals of displacement sensor 34 of the Auxiliary supports 30 are forwarded to the control unit 200. There they are converted into location information, and the position of the top support 40 is added up. The Sum is sent to the position control device 220 within the Control unit 200 forwarded the web movement of the Spinning roller 22 as an interpolated movement from the Cartesian Coordinates of lower and upper support 50, 40 controls.
  • the auxiliary support 30 is pushed back in relation to the upper support 40 when the pressure roller 20 contacts the pressure chuck 2, so that the position value X Q of the auxiliary support 30 decreases.
  • the upper support 40 is tracked in relation to the auxiliary support 30 in such a way that the auxiliary support 30 almost assumes its central position, that is to say that the position value X Q at the zero point lies within a tolerance range of, for example, ⁇ 0.5 mm.
  • This tolerance range is provided in order to ensure rapid adjustment of the position at the point of the workpiece contour recorded. In the spinning machine 100 of the invention, this tolerance band can be chosen almost arbitrarily and is actually only limited by the mechanically predetermined travel path of the auxiliary support 30.
  • the change in position of the auxiliary support 30 is detected by the current measurements of the displacement sensor 34 and forwarded to the control unit 200, where the measured value X Q of the auxiliary support 30 is offset against the measured value X H of the measuring sensor 44 of the upper support 40.
  • the backward movement of the auxiliary support 30 relative to the upper support 40 generates a Q coordinate with a negative sign or an electrical measurement signal with a negative voltage.
  • the accuracy of the X coordinate is in no way impaired by a tolerance band, since according to the invention the X value to be stored and retrieved later results from the addition of the position values X H and X Q.
  • the position of the auxiliary and upper support 30, 40 to one another is therefore irrelevant as long as the auxiliary support 30 is adjusted within the tolerance band.
  • the X and Z coordinates of the lower and upper supports 40, 50 are used as bases for path control in the storage and computing device 250 of control unit 200 stored.
  • the inventive design of the press machine 100 it is possible to do so during the so-called teach-in Record and save one performed by an operator Forming process, in the control unit 200 additionally to the coordinates X and Z of the spinning roller position also the instantaneous force exerted by the pressure roller 22 by measurement the pressure in the piston-cylinder unit 32 during of the teach-in, in the storage and computing device 250 of the control unit and later in Automatically running forming processes reproducible again retrieve.
  • the piston-cylinder unit 32 or the valve unit 36 is equipped with a pressure sensor, whose measurement signals flow into the control unit 200.
  • a workpiece is manufactured in a manner known per se Metal disc 1 placed on the rotating chuck 2, fixed by a pressure plate 3 and in a rotary movement added.
  • the movement of the Spinning roller 22 in this phase can by known per se Teach-in control devices take place, i.e. by automatic Execution of a previously saved movement of a manual rolling process.
  • the auxiliary support 30 is in a forward starting position pushed. This does not necessarily have to be one mechanical end stop, for example one end hold a linear guide. The only important thing is that a relative retreat of the auxiliary support 30 compared to the Upper support 40, away from the chuck 2, possible is.
  • the value of the Q coordinate or the measured value X Q of the auxiliary support 30 is added to the measured path or the measured value X H of the upper support 40 and the sum is continuously passed on to the position control device 220 for the X axis as the X coordinate of the pressure roller position , There, a comparison is made with the stored workpiece contour on the basis of the data stored in the storage and computing device 250 and, if necessary, a readjustment of the X axis.
  • the instantaneous values of the Z axis are also continuously compared by the position control device 210 with the target specifications from the storage and computing device 250 and, if necessary, a corresponding tracking is initiated.
  • a priority circuit within the control unit 200 can ensure that initially the stored or preset pressure values are maintained by the pressure control device 230 and only when the pressure inside the piston-cylinder unit 32 rises too much and the pressure force of the pressure roller 22 rises accordingly of the upper support 40 until the target value of the X coordinate is reached by the position control device 220.
  • the press machine 100 in contrast to those from the prior art Technology known devices and methods guaranteed that the pressure roller 22 is then in contact with the workpiece 1 and applies a forming force when the local wall thickness of the workpiece 1 is less than its theoretical target wall thickness.
  • the value of the X coordinate flowing into the position control device 220 is smaller than the target value at this point, since the path X H measured at the top support is reduced by the amount of X Q is.
  • the position control device initiates according to the priority circuit 220 thereupon a readjustment of the situation of the upper support 40 to set the target value of the X coordinate reach, causing a pressing with the pressure roller 22 and locally reduces the wall thickness to the target value or taking such a spinning roller position, at which a predetermined pressure in the piston-cylinder unit 32 and thus a predetermined forming force is held on the pressure roller 22.
  • the pressure should be 1.8 to 2.5 bar with a smooth overflow, based on a piston diameter of 40 mm and when forming an aluminum blank.
  • the pressure is preferably up to 5 bar around the material to press into the fine grooves of the pattern on the lining.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP02018936A 2001-08-25 2002-08-24 Machine de fluotournage avec support d' assistence Withdrawn EP1316372A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10141783 2001-08-25
DE2001141783 DE10141783A1 (de) 2001-08-25 2001-08-25 Drückmaschine mit Hilfssupport

Publications (2)

Publication Number Publication Date
EP1316372A2 true EP1316372A2 (fr) 2003-06-04
EP1316372A3 EP1316372A3 (fr) 2005-02-09

Family

ID=7696660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02018936A Withdrawn EP1316372A3 (fr) 2001-08-25 2002-08-24 Machine de fluotournage avec support d' assistence

Country Status (2)

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EP (1) EP1316372A3 (fr)
DE (1) DE10141783A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103108709A (zh) * 2010-10-01 2013-05-15 剑桥企业有限公司 旋压成形工艺及用于通过旋压成形来制造物品的装置
CN110214059A (zh) * 2017-05-05 2019-09-06 利费尔德金属旋压公司 用于增量成形金属工件的方法和装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007022012A1 (de) 2007-05-08 2008-11-13 Andreas Thomas Drückmaschine zur Verarbeitung von blechförmigen Materialien mit verschwenkbar gelagertem Drückwerkzeug
DE102012004323B4 (de) 2012-03-07 2013-11-28 Abacus Maschinenbau GmbH Drückmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565081A (en) * 1983-05-11 1986-01-21 Johan Massee Forming machine
US4747284A (en) * 1986-08-05 1988-05-31 Robert Hudson Metal spinning machine carriage and process for the operation of a metal spinning machine
US4976126A (en) * 1989-08-02 1990-12-11 Kabushiki Kaisha Yamamoto Kinzoku Seisakusho Spinning machine
DE4223510A1 (de) * 1992-07-17 1994-01-20 Bohner & Koehle Verfahren zum Betreiben einer numerisch gesteuerten Drückmaschine sowie Drückmaschine zur Durchführung des Verfahrens
US5355705A (en) * 1990-05-04 1994-10-18 Eckehart Schulze Process for controlling the revolving path motions of the spinning roller of a spinning lathe, and spinning lathe for performing the process
EP0754507A1 (fr) * 1995-07-20 1997-01-22 Johan Massée Procédé et appareil pour fluotourner de la tÔle
EP0774308A1 (fr) * 1995-11-17 1997-05-21 Johan Massée Procédé et appareil pour la fabrication d'un produit par fluotournage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565081A (en) * 1983-05-11 1986-01-21 Johan Massee Forming machine
US4747284A (en) * 1986-08-05 1988-05-31 Robert Hudson Metal spinning machine carriage and process for the operation of a metal spinning machine
US4976126A (en) * 1989-08-02 1990-12-11 Kabushiki Kaisha Yamamoto Kinzoku Seisakusho Spinning machine
US5355705A (en) * 1990-05-04 1994-10-18 Eckehart Schulze Process for controlling the revolving path motions of the spinning roller of a spinning lathe, and spinning lathe for performing the process
DE4223510A1 (de) * 1992-07-17 1994-01-20 Bohner & Koehle Verfahren zum Betreiben einer numerisch gesteuerten Drückmaschine sowie Drückmaschine zur Durchführung des Verfahrens
EP0754507A1 (fr) * 1995-07-20 1997-01-22 Johan Massée Procédé et appareil pour fluotourner de la tÔle
EP0774308A1 (fr) * 1995-11-17 1997-05-21 Johan Massée Procédé et appareil pour la fabrication d'un produit par fluotournage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103108709A (zh) * 2010-10-01 2013-05-15 剑桥企业有限公司 旋压成形工艺及用于通过旋压成形来制造物品的装置
CN110214059A (zh) * 2017-05-05 2019-09-06 利费尔德金属旋压公司 用于增量成形金属工件的方法和装置
CN110214059B (zh) * 2017-05-05 2021-10-08 利费尔德金属旋压公司 用于增量成形金属工件的方法和装置

Also Published As

Publication number Publication date
DE10141783A1 (de) 2003-03-13
EP1316372A3 (fr) 2005-02-09

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